Vulnerability Database

328,409

Total vulnerabilities in the database

CVE-2021-40360

A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions), SIMATIC PCS 7 V9.1 (All versions < V9.1 SP1), SIMATIC WinCC V15 and earlier (All versions < V15 SP1 Update 7), SIMATIC WinCC V16 (All versions < V16 Update 5), SIMATIC WinCC V17 (All versions < V17 Update 2), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 6). The password hash of a local user account in the remote server could be granted via public API to a user on the affected system. An authenticated attacker could brute force the password hash and use it to login to the server.

  • Published: Feb 9, 2022
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-40360
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 8.8
  • AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: Low
  • Score: 4
  • AV:N/AC:L/Au:S/C:P/I:N/A:N
Software From Fixed in
siemens / simatic_pcs_7 - 8.2.x
siemens / simatic_wincc 7.4-sp1 7.4-sp1.x
siemens / simatic_wincc 7.4 7.4.x
siemens / simatic_wincc 14.0.1 14.0.1.x
siemens / simatic_wincc 13-sp1 13-sp1.x
siemens / simatic_wincc 13 13.x
siemens / simatic_wincc 7.5-sp1 7.5-sp1.x
siemens / simatic_wincc 7.5-sp1_update1 7.5-sp1_update1.x
siemens / simatic_wincc 7.5-sp1_update2 7.5-sp1_update2.x
siemens / simatic_wincc 7.5 7.5.x
siemens / simatic_wincc 7.4-sp1_update1 7.4-sp1_update1.x
siemens / simatic_wincc 7.4-sp1_update2 7.4-sp1_update2.x
siemens / simatic_wincc 7.4-sp1_update3 7.4-sp1_update3.x
siemens / simatic_wincc 7.4-sp1_update4 7.4-sp1_update4.x
siemens / simatic_wincc 7.4-sp1_update5 7.4-sp1_update5.x
siemens / simatic_wincc 7.4-sp1_update6 7.4-sp1_update6.x
siemens / simatic_wincc 7.4-sp1_update7 7.4-sp1_update7.x
siemens / simatic_wincc 7.4-sp1_update8 7.4-sp1_update8.x
siemens / simatic_wincc 7.4-sp1_update9 7.4-sp1_update9.x
siemens / simatic_wincc 7.4-sp1_update10 7.4-sp1_update10.x
siemens / simatic_wincc 7.4-sp1_update11 7.4-sp1_update11.x
siemens / simatic_wincc 7.4-sp1_update12 7.4-sp1_update12.x
siemens / simatic_wincc 7.4-sp1_update13 7.4-sp1_update13.x
siemens / simatic_wincc - 7.4
siemens / simatic_wincc 15.1 15.1.x
siemens / simatic_wincc 15.1-update_1 15.1-update_1.x
siemens / simatic_wincc 15.1-update_2 15.1-update_2.x
siemens / simatic_wincc 15.1-update_3 15.1-update_3.x
siemens / simatic_wincc 15.1-update_4 15.1-update_4.x
siemens / simatic_pcs_7 9.0 9.0.x
siemens / simatic_wincc 16 16.x
siemens / simatic_wincc 7.5-sp2 7.5-sp2.x
siemens / simatic_wincc 7.5-sp2_update1 7.5-sp2_update1.x
siemens / simatic_wincc 7.5-sp2_update2 7.5-sp2_update2.x
siemens / simatic_wincc 7.5-sp2_update3 7.5-sp2_update3.x
siemens / simatic_wincc 7.5-sp2_update4 7.5-sp2_update4.x
siemens / simatic_wincc 15 15.x
siemens / simatic_wincc 17-update1 17-update1.x
siemens / simatic_wincc 17 17.x
siemens / simatic_wincc 16-update1 16-update1.x
siemens / simatic_wincc 16-update2 16-update2.x
siemens / simatic_wincc 16-update3 16-update3.x
siemens / simatic_wincc 16-update4 16-update4.x
siemens / simatic_wincc 13-sp2 13-sp2.x
siemens / simatic_wincc 7.5-sp2_update5 7.5-sp2_update5.x
siemens / simatic_pcs_7 9.1 9.1.x
siemens / simatic_wincc 15.1-update_6 15.1-update_6.x
siemens / simatic_wincc 15.1-update_5 15.1-update_5.x
siemens / simatic_wincc 7.4-sp1_update14 7.4-sp1_update14.x
siemens / simatic_wincc 7.4-sp1_update15 7.4-sp1_update15.x
siemens / simatic_wincc 7.4-sp1_update16 7.4-sp1_update16.x
siemens / simatic_wincc 7.4-sp1_update17 7.4-sp1_update17.x
siemens / simatic_wincc 7.4-sp1_update18 7.4-sp1_update18.x

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.